The 1.4-2.7 micron spectrum of the point source at the galactic center

Details The 1.4-2.7 micron spectrum of the point source at the galactic center The 1.4-2.7 micron spectrum of the point source at the galactic center

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...209l.115t&link_type=abstract

Astrophysical Journal, vol. 209, Nov. 1, 1976, pt. 2, p. L115-L118.

Astronomy and Astrophysics

Astronomy

19

Galactic Nuclei, Infrared Spectra, Interstellar Gas, Molecular Spectra, Point Sources, Stellar Spectra, Supergiant Stars, Gamma Rays, Infrared Astronomy, Milky Way Galaxy, Radial Velocity

Scientific paper

The spectrum of the 2-micron point source at the galactic center is presented over the range from 1.4 to 2.7 microns. The two-level-transition CO band heads are seen near 2.3 microns, confirming that the radiation from this source is due to a cool supergiant star. The heliocentric radial velocity is found to be - 173 (+ or -90) km/s and is consistent with the star being in orbit about a dense galactic nucleus. No evidence is found for Brackett-gamma emission, and no interstellar absorption features are seen. Upper limits for the column densities of interstellar H2, CH4, CO, and NH3 are derived.

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